A sample of compound X is found to contain 12.3 g of O, 18.4 g of C, and 25.7 g of N. The Law of Definite Proportion says if it weighs 90.3 g, how many grams of carbon are there?
There are 29.5 g of carbon.
The mass of the first sample is the sum of the masses of its elements.
According to the Law of Definite Proportions, every sample of
Thus, if you have a 90.3 g sample of